Some constraints on the operation of matrix displays
Alan Sobel · IEEE Transactions on Electron Devices · 1971
Matrix displays using electrically symmetrical elements cannot have many columns driven simultaneously unless all the electrodes are terminated in low impedances. If the undriven electrodes are allowed to float, elements which should be off will produce undesired outputs. Matrices of asymmetrical devices like junction diodes are less subject to this limitation on the driving circuitry.